Beooks



(ModeL) S. G. EASTERBROOKS.

Button and Stud.

Patented June 22,1880.

Fl G. 2.

'WITN ESS ES INVENTOR.

N.PETERS, FHOTO-LHHOGRAPHER, WASHINGTON, DIG.

UNITED STATES PATENT Orricn.

STEPHEN G. EASTERBROOKS, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO FRANK W. PARKER, OF SAME PLACE. I

BUTTON AND STUD.

SPECIFICATION formingpart of Letters Patent No. 229,108, dated June '22, 1880. Application filed March 1, 1880. (ModeL) To all whom it may concern:

Be it known that I, STEPHEN G. EASTER- BROOKS, of the city and county of Providence, in the State of Rhode Island, have invented a 5 new and useful Improvement in Buttons and Studs; and I declare the following to be a specification thereof, reference being bad to the accompanying drawings.

Like letters indicate like parts.

I Figure 1 is a side elevation of myinvention. Fig. 2 is a plan of the back of my improved button. Fig. 3 is avertical section. Fig. etis a transverse section on the line w 00.

Myinvention is animprovement on the but I 5 ton described in Letters Patent of the United States No. 67,691, granted to George M. White, August 13, A. D. 1867. That invention consists of a rectangular shank permanently fixed at one end to the button-front and at the other end to an elliptical-shaped cross-bar, and revolving within the post of the button, wherein it is held in the desired position by the pressure of a flat bow-spring upon opposite sides of said rectangular shank.

My improvement consists in making said shank with two opposite sides in parallel planes and its two edges rounding outwardly, by which arrangement the spring operates to lock the button only when the shank is turned one hundred and eighty degrees instead of ninety degrees, as hitherto; and in combining with a shank so constructed a semicircular disk attached thereto, which, in combination with a semicircular disk upon the post,

3 5 forms, when the shank is turned as described,

a circular back or shoe.

A is the button-front. B is an elliptical hollow post. The shank 0 extends through the post B, and is permanently fixed on one end to the button-front A, and on the other end to the semicircular disk D, extending therefrom at a right angle, as shown in Figs. 1 and 3.

The post B has a semicircular flange or plate, E, extending laterally at a right angle.

The post B, with its flange E, revolves about the shank 0, being held from lateral displacement by the inclosed spring F, and confined in the plane of its revolution by the back of the button A on one side and by the inner surface of the disk D on the'other.

The shank O, as shown in cross-section in Fig. 4, is made with two faces, which are plane and parallel with each other, and the two edges of which are convex.

The spring F is preferablya flat bow-spring fitting within the interior space of the post B, and bears against the flat faces of the shank Q toprevent the revolution. of the shank when fixed in the desired position.

In lockin g the button into the button-hole it is the edges of the button-hole which alone resist the revolution of the post as the buttonfront and its connected cross-bar are turned the quarter -revolution. Hence the button hole is apt to be strained apart and widened, Y and when it is so enlarged the cross-bar does not, sufficiently secure the button in the hole, but is liable to work out, causing the displacement or loss of the button. For the prevention of this difficulty I make the button with two semicircular disks or plates, which, when opened by a half-revolution of the shank, form together a circular back or shoe, which cannot work out of the button-hole, in the manner described.

The form of the shoe presents a smooth continuous edge in a circle, and therefore the button can be worn without discomfort, while the sharp ends of the narrow elliptical cross-bar will sometimes prick and irritate the flesh.

In order to adapt said patented button to the circular two-leaved back herein described the shank must be turned a half-revolution instead of a quarter-revolution. I therefore dispense with the square or rectangular form "of the shank, and make the shank in the form shown in cross-section in Fig. 4, so that the spring looks the shank only upon its two opposite and parallel sides, while the edges are convexed to facilitate the turning of the shank against the resistance of the springs. With a square face the shank presents consecutively two sharp corners to the spring in turning a half-revolution, while if made as I haveshown in my drawings it presents but one obtuse an- 5 gle in a halflrevolution.

I do not claim as myinvention a shank having plane faces and used in combination with a spring, that being the invention of said White, as aforesaid; neither do I claim the oo" two-leaved eceentrically-turning semicircular faces, and its two edges convex, in combinadisks or plates, forming, when opened, a cirtion with the flat spring F and the elliptical cular back or shoe, that device having been hollow post B, having a semicircular flange, long known and shown in several kinds of but- IE, made and 'operatin g substantially as speci- 5 tons in common use; but fied.

I claim as a novel and useful invention and desire to secure by Letters Patent STEPHEN EASTERBROOKS' The button-front A and semicircular disk D, Witnesses both permanently fixed upon the shank (J, the WARREN R. PERCE, IO latter having two opposite plane and parallel WM. B. W. HALLETT. 

